[PHOENIX-1462] Create unit test for COUNT DISTINCT using compression

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0, 4.0.0, 4.2.0, 3.2.0
• Assignee: ramkrishna.s.vasudevan
• Reporter: James R. Taylor
• Created: 18/Nov/14 02:28
• Updated: 21/Nov/15 02:17
• Resolved: 18/Nov/14 06:22

Description

Create a unit test for PHOENIX-1455 and ensure that it is calling the code to do compression. Something like this:

@Category(NeedsOwnMiniClusterTest.class)
public class CountDistinctCompressionIT extends BaseOwnClusterHBaseManagedTimeIT {
        
    @BeforeClass
    public static void doSetup() throws Exception {
        Map<String,String> props = Maps.newHashMapWithExpectedSize(3);
        // Must update config before starting server
          props.put(QueryServices.DISTINCT_VALUE_COMPRESS_THRESHOLD_ATTRIB, Long.toString(1));
        setUpTestDriver(new ReadOnlyProps(props.entrySet().iterator()));
    }

    @Test
    public void testDistinctCountOnColumn() throws Exception {
        String tenantId = getOrganizationId();
        initATableValues(tenantId, null, getDefaultSplits(tenantId), null);

        String query = "SELECT count(DISTINCT A_STRING) FROM aTable";

        Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES);
        Connection conn = DriverManager.getConnection(getUrl(), props);
        try {
            PreparedStatement statement = conn.prepareStatement(query);
            ResultSet rs = statement.executeQuery();
            assertTrue(rs.next());
            assertEquals(3, rs.getLong(1));
            assertFalse(rs.next());
        } finally {
            conn.close();
        }
    }